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Orginal…You are correct…it is textured paint or paint on top of a texture…my bad. Not sure how to improve it…start with some wax and maybe a light cutting compound…
It's paint on top of a texture... that's why it originally matches the car. This is the same issue as the seam sealer sections. GPW likes to discolor and turn yellow over these areas. It can be corrected with normal paint correction.